dt-bindings: Add JDI LT070ME05000 panel bindings

The JDI LT070ME05000 is a 7" panel with a 1200x1920 (WUXGA) resolution
and connected to DSI using four lanes.

Cc: Archit Taneja <archit.taneja@gmail.com>
Cc: John Stultz <john.stultz@linaro.org>
Cc: Thierry Reding <thierry.reding@gmail.com>
Cc: Sumit Semwal <sumit.semwal@linaro.org>
Signed-off-by: Vinay Simha BN <simhavcs@gmail.com>
Acked-by: Rob Herring <robh@kernel.org>
Signed-off-by: Thierry Reding <treding@nvidia.com>